Katten Muchin Rosenman

Katten Muchin Rosenman is a US-based firm with key IP locations in New York, Chicago, and Washington DC. The firm maintains national rankings in trademark litigation and prosecution, and also has a notable life sciences-focused patent litigation team.

Notable practitioners at the firm include Karen Artz Ash, Floyd Mandell, Deepro Mukerjee and Lance Soderstorm. Ash is co-chair of the trademark, copyright and advertising group, who in her personal practice focused on trademark prosecution and licensing. Mandell co-chairs the practice group with Ash, and offers deep trademark litigation expertise. Mukerjee and Soderstorm specialize in Hatch-Waxman patent litigation, often for generic drugmakers.

2024/2025

"When I need a second opinion, someone to refer a case, or just a wise person's thoughtful input, I choose Floyd Mandell, the co-chair of the national IP practice at Katten. Floyd is smart, strategic, creative and very client-focused. He provides advice that is always directed to the specific client's situation and needs, rather than generalized information. He is very responsive and a true collaborator. I have valued Floyd's advice for decades and entrust him with my most important clients and most significant matters."

"They are super-proactive and good professionals."

"I chose Katten because they are exceptional attorneys, particularly Floyd Mandell, who is likely the most pre-eminent IP litigator in the country. I trust the team's lawyering skills, their judgement, their client service, and see the team as an extension of my own."

"I just believe that the people at the firm are very good, super-responsive and are willing to work with Indian clients on their expectations and costs."

Floyd Mandell

"Handles every type of IP work."

"To be frank, there is nothing that Floyd does not do well – he is exceptional and brilliant. If I had a personal matter requiring an IP attorney, he would be the first person I would call – bar none. He has made case law in the IP space for decades and is the consummate professional and gentleman."

"He is an incredibly smart and thoughtful attorney, and a very nice person to work with."

Sean Wooden

"Handles everything in the patent prosecution field."

2023

"We value their responsiveness and prioritisation of each client and matter."

"We appreciate their understanding of creative legal solutions."

"We value the quality of their work."

"They are responsive, cost-effective and efficient."

"We value their responsiveness and expertise."

"They are extremely responsive, knowledgeable and reliable."

"They are great people who provide great legal representation. Truly a pleasure to work with, particularly Floyd Mandell, who is extremely responsive and client-focused."

"Very knowledgeable, hard-working and terrific service. Floyd Mandell is the best active practitioner in this area that I know."

"We appreciate the fact that they deal directly with any problems that may arise and address them to the point and to the core, providing viable and effective solutions."

"We appreciate their deep knowledge, terrific client service, great judgement and very nuanced understanding of the most difficult aspects of trademark law."

2022 client testimonials

"High-quality work, very easy to work with, and reasonable budgets."

The firm recently represented Sun Pharmaceuticals in a Hatch-Waxman litigation with the aim of marketing a generic version of a bipolar disorder drug. Other notable patent clients are Sawai Pharmaceutical, Mylan Pharmaceuticals and Red Box Recorders. The firm also manages the patent portfolio for Nureva, an audio conferencing system developer.